I have over twenty years as an Apple enthusiast, customer, investor, and historian. It's something I just know. It's well documented if you read about the relationship between those two as friends, arch enemies, competitors, and titans in the industry. Their special connection is why the only letter Steve kept at his deathbed was the one from Bill Gates.

I've read of Jobs referred to as 'the ultimate user' (playing on the phrase 'end-user'), due to him personally using and testing products extensively. I'd assume that he was constantly upgrading to apple's latest range and prototypes of all models so that he could give his ultimate judgement.

1) In computers, the form factor (sometimes hyphenated as form-factor) is the size, configuration, or physical arrangement of a computer hardware object. The term is commonly used in describing the size and/or arrangement of a computer case or chassis or one of its internal components such as a daughterboard

1) In computers, the form factor (sometimes hyphenated as form-factor) is the size, configuration, or physical arrangement of a computer hardware object. The term is commonly used in describing the size and/or arrangement of a computer case or chassis or one of its internal components such as a daughterboard